Ventilating fan



March 27, 1928.

J. D. PARKER VENTILATING FAN Filed Aug. 5, 1926 4 Sheets-Sheet l INVENTOR James D. Parker ATTORNEY March 27, 1928. 1,664,183

J. D. PARKER VENTILATING FAN Filed Aug. 5. 1926 4 Sheets-Sheet 2 INVENTOR Jmnea D. Pqrker:

ATTORNEY March 27, 1928. 1,664,183

J. D. PARKER VENTILATING FAN 'Filed' Aug. 5. 1926 4 Sheets-Sheet 3 IN V EN 'I'OR.

domes D. Parker ATTORNEY.

March 27, 1928. 1,664,183

J. D. PARKER VENTILA'IING FAN il 1926 4 Sheets-Sheet 4 INVENTOR.

James D. Parker ATTORNEY.

Patented Mar. 27, 1928.

PATENT OFFICE.

JAMES D. PARKER, OF KANSAS CITY, KANSAS.

VENTILATING FAN.

Application filed August 5, 1926 Serial No. 127,433.

The invention relates to improvements in ventilating and air circulating fans, and more particularly to certain improvements in the fan for which Letters Patent of the United States Number 1,587,031 was issued to me June 1, 1926. A

The inner end of the blades of the fan of my former invention are secured to wings that extend diagonally the lengthof the hub, andthe only practical method now known of forming the hub is to cast it with a dry sand core between each adjacent pair of wings. It has been found in practice that the mould ing and baking of the number of cores required daily is objectionable from a productive standpoint, provided the cores can be eliminated and the same high efficiency of the fan maintained.

The presentinvention has provided a fan y with a hub so shaped that itis easily cast in green sand moulds and. the wings formed without the employment of cores, together with certain other improvements.

lVith these and other objects in view the invention consists inthe features of construction, combinations andarrangements of parts hereinafter set forth and more particularly pointed out in the appended claims, the accompanying drawings illustrating a fan with the improved form of hub, and which attains the same high efliciency of the fan a of my former invention.

In the drawings p Fig. 1 is a view in elevation of the intake and suction side of a fan embodying the features of my present invention.

Fig. 2 is an enlarged fragmentary broken view of the fan with all but one of the blades removed.

Figs. 3, 4:, 5 and 6 are further enlarged.

Fig. 3 is an end view of the hub of the improved fan.

Fig. 4 is a longitudinal View of the hub broken open on line 44 of Fig. 3.,

Fig. 5 is alongitudinal view of the hub broken open on line 5-.5 of Fig. 3, with a fragment of each of two oppositely positioned blades attached and the intervening iviiggs removed with the broken part of the 111 Fig. 6 is a longitudinal view of the hub at a rotary angle of approximately 90 degrees Fig. 8 is from that of Fig. 5, with a fragment of a blade attached, and one of the wings broken away to save room in illustrating.

- Figs. 7, 8 and!) are still further enlarged.

Fig. 7 is a sectional view taken on line 7-7. of Fig. 2.

a sectional view taken on line 8--8 of Fig. 2.

"Fig. 9 is. a sectional view taken on line 9 9 ofFig. 2.

Figs. 10 to 17 inclusive are slightly modified forms and are of the same scale as Figs. 8, l, 5 and 6.

Fig. 101's approximately the same view as Fig. 4c and illustrates the same hub as that shown in Figs. 3, 4: 5 and 6 excepting the hub is straight instead of slightly tapering.

Fig. 11. is the same as Fig. 10, but with two oppositely positioned blades attached, the blades being shown in fragmentary View.

Figs. 12, 13, 14 and 15 show the same hub as that of Figs. 10 and 11, but with the spiral connections of the wings extended to the center of the hub longitudinally, Fig. 12 being a side view, Fig. 13 a broken side view with two oppositely positioned blades at tached, Fig. 14 an end view with two blades attached, and Fig. 15 the opposite end with two blades attached, the bladesbeing shown in fragmentary view.

Figs. 16 and 17 are the same as the hub illustrated in Figs. 3 to 6 inclusive, excepting the hub is separated and formed in two parts so that the same hub may be employed for different dimensioned fans.

, The shaft 1, ring 2, spoke center 3. spokes 4 and theattachment of the blades 5 to the main stays 6, back stays 7 and ring 2 by wrapping the edge of the blade around the stays and ring as illustrated in Figs. 2, 7, 8 and 9 are not new and are shown merely to show the relations of the improvements thereto.

. The hub body 8 is of approximately cylin drical shape, is bored to receive the shaft 1 and secured thereto, the sctscrew 9 illustrating the usual method of securing the shaft in the hub. lhe hub body 8 is provided with the wings 10 at the air receiving end 11 thereof and with the wings 12 at the air discharge end 13 thereof, this with reference to the direction of the travel of the air blast over the hub when the fan is in operation. The fan is rotated in the direction indicated by the arrows shown in Figs. 1 and 3.

The blades 5 lay against the-blade hearing faces 14 and 15 of the wings 10 and 12 respectively and are bolted thereto by the respective bolts 16 and 17- which also pass through the main stays 6 and back stays 7 respectively, the blades being secured to the stays by the respective rivetslS and. 19 and by forming the edges of the blade around the stays as shown in- Figs. '1 and. 8. V

The blades 5 are secured to the ring2. by the rivets 20- andby' folding. the edge oi the blade around theedge of the ringas shown in. Fig. 9. Y I

The wings 10 and 12 are integral with the hub body 8 asshown. and are so: positioned that the blade bearing faces 14:. and. 15 lie in anapproximate common planeradially disposed from the axis of the-hub near the center of the length thereof and converge considerably laterally in opposite directions from the axis at the two ends of the hub, so

I that with reference. to: the direction: of

rotation of the fan and 111110,. ea'clr blade hearing face 14% is considerably in; advance of the: companion blade bearingi face 15.

The wings'li) and 1:2.are joined to the hub body 8" by the spirally disposed connecting ribs 21 and. 22. respectively and. the hub body is smaller in'diameter near the center of its length 23 than at the ends 11 and 13, so that the end- 24 of the blade 5. is straight as shownin. Fig- 5 and the blade bears againstthie hub body between. the Wings 10 and 12 so thatno air current can pass 1 between the-blade and the hub;

The wings 12. are beveled: along the inne I edge. 25 thereof that no obstruction will be encountered by the flow of. air when. the fan is in operation.

Figs. 1-0 and 1h illustrate a slightly modified fornrwherein the hub body 8 is. formed straight and the blades 5 are curved at the ends 24 thereozt sons to. abut the hub body and prevent air currents around the hub, this form being otherwise the same as that shown in Figs. 3 to 6' inclusive.-

In Figs. 12, 13,14 and 15 a further modified forin is illustrated wherein the spiral ribs 21 and 22 are extended to near the 7 center longitudinally ofthe huhbody 8 and abutting for a small fan and Fig. 17 illustratcs the hub further separated for a larger fan, the blades 5 being formed to abut the hub and the shaft 1. In this construction the two parts of the hub 8 must be held rigidly in the required relative rotary position to maintain the proper pitch of the bladesfiand the setscrews 9 are shown for this purpose, the screws being sunk into theshaft 1 as indicated by dotted lines at 26.

The wingslO and 12, 10 and 12, 10" and 12 and 10 and1'2 'are all uniform and all are secured. to the. respective hub bodies in the same manner- In the preferred. form illustrated Figs. 1. to 9 inclnsive. aswell as. in all;- the modified forms, the blades are. in close proximity to the hub and prevent air currents around the hub. and shaft andunder'the blades so there is no backlash. or reverse. currents of air.

It. will. benoted that a the blades are closer to the axis. of the. hub at the longitudinal center thereof than at either end. of the hub, and there beingno wings at. this pointallows more. air to pass through; the fan, so that greater efliiciency attained. inagiven diameter of fan- The fan also runs more smooth-v by and noiseless and can he run at greater speed, owing? to the reduced weightv of the hub, there being less weight to vibrate.

All claims appended hereto which may conflict with the claims of. my former Patent.

I end of said. hub, each of said wings on one v endof said: hub a companionof: a wing on.

the opposite end of. saidhub, each companion pair of said wings. disposed in. a common spiral along the cylindrical periphery of said hub and. then changing to a" fiat rectangular shape so that the'flat rectangul'arportion of each companion. pair of said wings lie in. a common plane. disposed radially from: and crossing: the axis of saidhub. near the center of the length thereof at an acute angle to-the axis of said hub, anda flat blade hearing against. and secured to. the flat rectangular portion of each companion pair of said wings and projecting from said hub. in the same general. direction as the flat portion of said. wings.- i

2. A'fan comprising a huhof approxi mately cylindrical shape, a series of. wings spaced apart circumferentially around. each end. of? said hub, each of said. wings on one end of said hub a companion of a wing, on the opposite end of said hub, each companion pair of said: wings disposed. in a com-' mon spiral along the cylindrical periphery of said hub and then changing to a flat rectangular shape so that the flat rectztngular portion of each companion pair of said wings lie in a common plane disposed radially from and crossing the axis of said hub near the center of the length thereof at an acute angle to the axis of said hub, a blade attached to the flat rectangular portion of each companion pail. of said wings, and said blade in close proximity to said hub from 10 end. to end thereof so that no aircurrent can pass between said hub and said blades.

JAMES D. PARKER. 

